Metal working – Barrier layer or semiconductor device making – Barrier layer device making
Patent
1981-03-30
1982-04-20
McQuade, John
Metal working
Barrier layer or semiconductor device making
Barrier layer device making
H01J 918
Patent
active
043251668
ABSTRACT:
A method is provided for positioning a supporting frame for a color television tube mask in a repeatedly obtainable rest position with respect to the face plate of the tube during various stages of the tube manufacture which require accurate positioning of the frame. Such stages include attachment of the mask to the frame to form a color selection electrode, connection to the frame of means for increasing the mechanical stability of the electrode, and repeated exposures and chemical treatments of color phosphors on the face plate. The method comprises applying a time-varying magnetic field to the frame until it is vibrated into an ultimate rest position relative to the face plate.
REFERENCES:
patent: 3482286 (1969-12-01), Fassett et al.
patent: 3672014 (1972-06-01), Kimbrough
patent: 3701185 (1972-10-01), Van Renssen
patent: 3701193 (1972-10-01), Ragland, Jr.
patent: 3838483 (1974-10-01), Baranski et al.
patent: 4058875 (1977-11-01), Nubani et al.
Goddecke Hubert
Reichardt Werner
Schumacher Kurt
Topfer Rainer
Kraus Robert J.
McQuade John
U.S. Philips Corporation
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